On Fox News Thursday, O'Reilly calls Jennifer Ford "insane" and says judge Perry did an "excellent job in a very frustrating case."

On his Fox News show Thursday, Bill O'Reilly went off on the Casey Anthony juror who gave an interview to ABC News explaining why they voted that Casey Anthony was not guilty in the death of her 2-year-old daughter, Caylee.

After playing a clip of Ford telling ABC News' Terry Moran that she thinks Caylee may have died after a pool accident, which is the theory the defense put forward, O'Reilly fumed, "What on earth is Jennifer Ford talking about? … Are you kidding me? There is no evidence that Caylee Anthony died from an accident. None. It was a theory from the defense team, and when crunch time came they couldn't present a shred of evidence to back up the theory. Yet Jennifer Ford -- and I believe other jurors -- apparently believes there could have been an accident involved. Based on what? Maybe a Martian came down and put duct tape over Caylee's mouth? Juries have to operate on facts, not irresponsible, unproved theories."

"The fact that Ms. Ford would say that on national television, that she believes an accident might have occurred, is chilling. Again, how the heck would she know? No evidence establishes any accident. So here we have a jury member failing to convict Casey Anthony on murder charges and pointing to a theory to justify the decision. That's insane," he continued.

"If alleged murderers can get acquitted based on theoretical fantasies, then our entire justice system has collapsed. It's that simple," he went on.

But he had positive words for Judge Belvin Perry, who sentenced Anthony to the maximum four years in jail and a $4,000 fine. She will be released on July 13, having spent more than 1,000 days in jail while awaiting trail.

"Judge Perry gave Ms. Anthony the maximum sentence because I believe he believes she's guilty as hell," said O'Reilly. "I also think the judge did an excellent job in a very frustrating case, as the defense team tried every trick in the book to confuse the jury. Of course, no proceeding is perfect and the judge made some mistakes, but overall Judge Belvin Perry is a patriot."